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  • Error transcoding with FFmpeg : Error : Output format hls is not available

    6 mai 2024, par asif mohmd

    I am using FFmpeg library to transcode a video file into multiple resolutions and create an HLS (HTTP Live Streaming) master playlist.

    


    It takes a video file as input but its does give me the output with HLS playlist.I got a error called "Output format hls is not available". Only the Output directory is creating

    


    I am using FFMpeg 7.0 full build version and also tried older versions and ffmpeg essentials and also tried chocolatey.

    


    if i remove the implementation of HLS from this code.it will create 4 different resolution videos in my output.

    


    Note:I just tried this same code on my friend MAC Book by only changing the setffmpegPath : "ffmpeg.setFfmpegPath("C :\ffmpeg\bin\ffmpeg.exe") ;" to his ffmpeg directory.
Its working perfectly in his mac book

    


    import "dotenv/config";&#xA;import * as fs from "fs";&#xA;import * as path from "path";&#xA;import ffmpeg from "fluent-ffmpeg";&#xA;import crypto from "crypto";&#xA;&#xA;ffmpeg.setFfmpegPath("C:\\ffmpeg\\bin\\ffmpeg.exe");&#xA;&#xA;export const FFmpegTranscoder = async (file: any): Promise<any> => {&#xA;  try {&#xA;    console.log("Starting script");&#xA;    console.time("req_time");&#xA;&#xA;    const randomName = (bytes = 32) =>&#xA;      crypto.randomBytes(bytes).toString("hex");&#xA;    const fileName = randomName();&#xA;    const directoryPath = path.join(__dirname, "..", "..", "input");&#xA;    const filePath = path.join(directoryPath, `${fileName}.mp4`);&#xA;&#xA;    if (!fs.existsSync(directoryPath)) {&#xA;      fs.mkdirSync(directoryPath, { recursive: true });&#xA;    }&#xA;&#xA;    const paths = await new Promise<any>((resolve, reject) => {&#xA;      fs.writeFile(filePath, file, async (err) => {&#xA;        if (err) {&#xA;          console.error("Error saving file:", err);&#xA;          throw err;&#xA;        }&#xA;        console.log("File saved successfully:", filePath);&#xA;&#xA;        try {&#xA;          const outputDirectoryPath = await transcodeWithFFmpeg(&#xA;            fileName,&#xA;            filePath&#xA;          );&#xA;          resolve({ directoryPath, filePath, fileName, outputDirectoryPath });&#xA;        } catch (error) {&#xA;          console.error("Error transcoding with FFmpeg:", error);&#xA;        }&#xA;      });&#xA;    });&#xA;    return paths;&#xA;  } catch (e: any) {&#xA;    console.log(e);&#xA;  }&#xA;};&#xA;&#xA;const transcodeWithFFmpeg = async (fileName: string, filePath: string) => {&#xA;  const directoryPath = path.join(&#xA;    __dirname,&#xA;    "..",&#xA;    "..",&#xA;    `output/hls/${fileName}`&#xA;  );&#xA;&#xA;  if (!fs.existsSync(directoryPath)) {&#xA;    fs.mkdirSync(directoryPath, { recursive: true });&#xA;  }&#xA;&#xA;  const resolutions = [&#xA;    {&#xA;      resolution: "256x144",&#xA;      videoBitrate: "200k",&#xA;      audioBitrate: "64k",&#xA;    },&#xA;    {&#xA;      resolution: "640x360",&#xA;      videoBitrate: "800k",&#xA;      audioBitrate: "128k",&#xA;    },&#xA;    {&#xA;      resolution: "1280x720",&#xA;      videoBitrate: "2500k",&#xA;      audioBitrate: "192k",&#xA;    },&#xA;    {&#xA;      resolution: "1920x1080",&#xA;      videoBitrate: "5000k",&#xA;      audioBitrate: "256k",&#xA;    },&#xA;  ];&#xA;&#xA;  const variantPlaylists: { resolution: string; outputFileName: string }[] = [];&#xA;&#xA;  for (const { resolution, videoBitrate, audioBitrate } of resolutions) {&#xA;    console.log(`HLS conversion starting for ${resolution}`);&#xA;    const outputFileName = `${fileName}_${resolution}.m3u8`;&#xA;    const segmentFileName = `${fileName}_${resolution}_%03d.ts`;&#xA;&#xA;    await new Promise<void>((resolve, reject) => {&#xA;      ffmpeg(filePath)&#xA;        .outputOptions([&#xA;          `-c:v h264`,&#xA;          `-b:v ${videoBitrate}`,&#xA;          `-c:a aac`,&#xA;          `-b:a ${audioBitrate}`,&#xA;          `-vf scale=${resolution}`,&#xA;          `-f hls`,&#xA;          `-hls_time 10`,&#xA;          `-hls_list_size 0`,&#xA;          `-hls_segment_filename ${directoryPath}/${segmentFileName}`,&#xA;        ])&#xA;        .output(`${directoryPath}/${outputFileName}`)&#xA;        .on("end", () => resolve())&#xA;        .on("error", (err) => reject(err))&#xA;        .run();&#xA;    });&#xA;    const variantPlaylist = {&#xA;      resolution,&#xA;      outputFileName,&#xA;    };&#xA;    variantPlaylists.push(variantPlaylist);&#xA;    console.log(`HLS conversion done for ${resolution}`);&#xA;  }&#xA;  console.log(`HLS master m3u8 playlist generating`);&#xA;&#xA;  let masterPlaylist = variantPlaylists&#xA;    .map((variantPlaylist) => {&#xA;      const { resolution, outputFileName } = variantPlaylist;&#xA;      const bandwidth =&#xA;        resolution === "256x144"&#xA;          ? 264000&#xA;          : resolution === "640x360"&#xA;          ? 1024000&#xA;          : resolution === "1280x720"&#xA;          ? 3072000&#xA;          : 5500000;&#xA;      ``;&#xA;      return `#EXT-X-STREAM-INF:BANDWIDTH=${bandwidth},RESOLUTION=${resolution}\n${outputFileName}`;&#xA;    })&#xA;    .join("\n");&#xA;  masterPlaylist = `#EXTM3U\n` &#x2B; masterPlaylist;&#xA;&#xA;  const masterPlaylistFileName = `${fileName}_master.m3u8`;&#xA;&#xA;  const masterPlaylistPath = `${directoryPath}/${masterPlaylistFileName}`;&#xA;  fs.writeFileSync(masterPlaylistPath, masterPlaylist);&#xA;  console.log(`HLS master m3u8 playlist generated`);&#xA;  return directoryPath;&#xA;};&#xA;</void></any></any>

    &#xA;

    My console.log is :

    &#xA;

        Starting script&#xA;    HLS conversion starting for 256x144&#xA;    Error transcoding with FFmpeg: Error: Output format hls is not available&#xA;        at C:\Users\asifa\Desktop\Genius Grid\Transcode-service\node_modules\fluent-ffmpeg\lib\capabilities.js:589:21&#xA;        at nextTask (C:\Users\asifa\Desktop\Genius Grid\Transcode-service\node_modules\async\dist\async.js:5791:13)&#xA;        at next (C:\Users\asifa\Desktop\Genius Grid\Transcode-service\node_modules\async\dist\async.js:5799:13)&#xA;        at C:\Users\asifa\Desktop\Genius Grid\Transcode-service\node_modules\async\dist\async.js:329:20&#xA;        at C:\Users\asifa\Desktop\Genius Grid\Transcode-service\node_modules\fluent-ffmpeg\lib\capabilities.js:549:7&#xA;        at handleExit (C:\Users\asifa\Desktop\Genius Grid\Transcode-service\node_modules\fluent-ffmpeg\lib\processor.js:170:11)&#xA;        at ChildProcess.<anonymous> (C:\Users\asifa\Desktop\Genius Grid\Transcode-service\node_modules\fluent-ffmpeg\lib\processor.js:184:11)&#xA;        at ChildProcess.emit (node:events:518:28)&#xA;        at ChildProcess.emit (node:domain:488:12)&#xA;        at Process.ChildProcess._handle.onexit (node:internal/child_process:294:12) &#xA;</anonymous>

    &#xA;

    I am using Windows 11 and FFMpeg version 7.0. I repeatedly checked, using CMD commands, that my FFMpeg was installed correctly and confirmed the environment variables path, experimented with various FFMpeg versions, and tried with FFMpeg full build Chocolatey package.

    &#xA;

    In Command Line its working perfectly :

    &#xA;

    PS C:\Users\asifa\Desktop\test fmmpeg> ffmpeg -hide_banner -y -i .\SampleVideo_1280x720_30mb.mp4 -vf scale=w=640:h=360:force_original_aspect_ratio=decrease -c:a aac -b:v 800k -c:v h264 -b:a 128k -f hls -hls_time 14 -hls_list_size 0 -hls_segment_filename beach/480p_%03d.ts beach/480p.m3u8&#xA;Input #0, mov,mp4,m4a,3gp,3g2,mj2, from &#x27;.\SampleVideo_1280x720_30mb.mp4&#x27;:&#xA;  Metadata:&#xA;    major_brand     : isom&#xA;    minor_version   : 512&#xA;    compatible_brands: isomiso2avc1mp41&#xA;    creation_time   : 1970-01-01T00:00:00.000000Z&#xA;    encoder         : Lavf53.24.2&#xA;  Duration: 00:02:50.86, start: 0.000000, bitrate: 1474 kb/s&#xA;  Stream #0:0[0x1](und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 1086 kb/s, 25 fps, 25 tbr, 12800 tbn (default)&#xA;      Metadata:&#xA;        creation_time   : 1970-01-01T00:00:00.000000Z&#xA;        handler_name    : VideoHandler&#xA;        vendor_id       : [0][0][0][0]&#xA;  Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 383 kb/s (default)&#xA;      Metadata:&#xA;        creation_time   : 1970-01-01T00:00:00.000000Z&#xA;        handler_name    : SoundHandler&#xA;        vendor_id       : [0][0][0][0]&#xA;Stream mapping:&#xA;  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))&#xA;  Stream #0:1 -> #0:1 (aac (native) -> aac (native))&#xA;Press [q] to stop, [?] for help&#xA;[libx264 @ 000001ef1288ec00] using SAR=1/1&#xA;[libx264 @ 000001ef1288ec00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2&#xA;[libx264 @ 000001ef1288ec00] profile High, level 3.0, 4:2:0, 8-bit&#xA;[libx264 @ 000001ef1288ec00] 264 - core 164 r3190 7ed753b - H.264/MPEG-4 AVC codec - Copyleft 2003-2024 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=11 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=800 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00&#xA;Output #0, hls, to &#x27;beach/480p.m3u8&#x27;:&#xA;  Metadata:&#xA;    major_brand     : isom&#xA;    minor_version   : 512&#xA;    compatible_brands: isomiso2avc1mp41&#xA;    encoder         : Lavf61.1.100&#xA;  Stream #0:0(und): Video: h264, yuv420p(progressive), 640x360 [SAR 1:1 DAR 16:9], q=2-31, 800 kb/s, 25 fps, 90k tbn (default)&#xA;      Metadata:&#xA;        creation_time   : 1970-01-01T00:00:00.000000Z&#xA;        handler_name    : VideoHandler&#xA;        vendor_id       : [0][0][0][0]&#xA;        encoder         : Lavc61.3.100 libx264&#xA;      Side data:&#xA;        cpb: bitrate max/min/avg: 0/0/800000 buffer size: 0 vbv_delay: N/A&#xA;  Stream #0:1(und): Audio: aac (LC), 48000 Hz, 5.1, fltp, 128 kb/s (default)&#xA;      Metadata:&#xA;        creation_time   : 1970-01-01T00:00:00.000000Z&#xA;        handler_name    : SoundHandler&#xA;        vendor_id       : [0][0][0][0]&#xA;        encoder         : Lavc61.3.100 aac&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p_000.ts&#x27; for writing speed=15.5x&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p.m3u8.tmp&#x27; for writing&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p_001.ts&#x27; for writing speed=17.9x&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p.m3u8.tmp&#x27; for writing&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p_002.ts&#x27; for writing speed=17.3x&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p.m3u8.tmp&#x27; for writing&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p_003.ts&#x27; for writing speed=19.4x&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p.m3u8.tmp&#x27; for writing&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p_004.ts&#x27; for writing speed=19.3x&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p.m3u8.tmp&#x27; for writing&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p_005.ts&#x27; for writing speed=19.2x&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p.m3u8.tmp&#x27; for writing&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p_006.ts&#x27; for writing&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p.m3u8.tmp&#x27; for writing&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p_007.ts&#x27; for writing speed=19.4x&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p.m3u8.tmp&#x27; for writing&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p_008.ts&#x27; for writing speed=19.5x&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p.m3u8.tmp&#x27; for writing&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p_009.ts&#x27; for writing speed=19.5x&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p.m3u8.tmp&#x27; for writing&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p_010.ts&#x27; for writing speed=19.4x&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p.m3u8.tmp&#x27; for writing&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p_011.ts&#x27; for writing/A    =19.4x&#xA;[hls @ 000001ef12482040] Opening &#x27;beach/480p.m3u8.tmp&#x27; for writing&#xA;[out#0/hls @ 000001ef11d4e880] video:17094KiB audio:2680KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: unknown&#xA;frame= 4271 fps=485 q=-1.0 Lsize=N/A time=00:02:50.76 bitrate=N/A speed=19.4x&#xA;[libx264 @ 000001ef1288ec00] frame I:45    Avg QP:10.29  size: 60418&#xA;[libx264 @ 000001ef1288ec00] frame P:1914  Avg QP:14.53  size:  5582&#xA;[libx264 @ 000001ef1288ec00] frame B:2312  Avg QP:20.63  size:  1774&#xA;[libx264 @ 000001ef1288ec00] consecutive B-frames: 22.9% 11.9%  8.6% 56.6%&#xA;[libx264 @ 000001ef1288ec00] mb I  I16..4: 15.6% 32.1% 52.2%&#xA;[libx264 @ 000001ef1288ec00] mb P  I16..4:  0.3%  3.4%  1.2%  P16..4: 20.3% 10.0% 13.1%  0.0%  0.0%    skip:51.8%&#xA;[libx264 @ 000001ef1288ec00] mb B  I16..4:  0.1%  0.9%  0.4%  B16..8: 17.2%  5.6%  2.8%  direct: 2.0%  skip:71.0%  L0:41.5% L1:44.1% BI:14.4%&#xA;[libx264 @ 000001ef1288ec00] final ratefactor: 16.13&#xA;[libx264 @ 000001ef1288ec00] 8x8 transform intra:58.4% inter:51.7%&#xA;[libx264 @ 000001ef1288ec00] coded y,uvDC,uvAC intra: 86.7% 94.3% 78.8% inter: 12.6% 15.0% 4.5%&#xA;[libx264 @ 000001ef1288ec00] i16 v,h,dc,p: 17% 42% 14% 28%&#xA;[libx264 @ 000001ef1288ec00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 19% 11%  6%  7%  8%  8%  9%  9%&#xA;[libx264 @ 000001ef1288ec00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 18% 12%  6%  9%  9%  8%  8%  7%&#xA;[libx264 @ 000001ef1288ec00] i8c dc,h,v,p: 44% 24% 20% 12%&#xA;[libx264 @ 000001ef1288ec00] Weighted P-Frames: Y:0.0% UV:0.0%&#xA;[libx264 @ 000001ef1288ec00] ref P L0: 78.3%  9.7%  8.8%  3.2%&#xA;[libx264 @ 000001ef1288ec00] ref B L0: 92.5%  6.0%  1.5%&#xA;[libx264 @ 000001ef1288ec00] ref B L1: 97.1%  2.9%&#xA;[libx264 @ 000001ef1288ec00] kb/s:819.63&#xA;[aac @ 000001ef128f7c80] Qavg: 452.137&#xA;

    &#xA;

    When I use the .on(&#x27;start&#x27;, (cmdline) => console.log(cmdline))} code with the -f hls command, the error "Output format hls is not available" appears, as previously mentioned. But my Console.log looks like this if I run my code without using -f hls command :

    &#xA;

    Without -f hls command

    &#xA;

    await new Promise<void>((resolve, reject) => {&#xA;  ffmpeg(filePath)&#xA;    .outputOptions([&#xA;      `-c:v h264`,&#xA;      `-b:v ${videoBitrate}`,&#xA;      `-c:a aac`,&#xA;      `-b:a ${audioBitrate}`,&#xA;      `-vf scale=${resolution}`,&#xA; &#xA;      `-hls_time 10`,&#xA;      `-hls_list_size 0`,&#xA;      `-hls_segment_filename ${directoryPath}/${segmentFileName}`,&#xA;    ])&#xA;    .output(`${directoryPath}/${outputFileName}`)&#xA;    .on(&#x27;start&#x27;, (cmdline) => console.log(cmdline)) &#xA;    .on("end", () => resolve())&#xA;    .on("error", (err) => reject(err))&#xA;    .run();&#xA;});&#xA;</void>

    &#xA;

    Console.log is :

    &#xA;

    `Starting script&#xA;File saved successfully: C:\Users\asifa\Desktop\Genius Grid\Transcode-service\input\c9fcf43726e617a295b203d5acb7b81658b5f05f80eafc74cee21b053422fef1.mp4&#xA;HLS conversion starting for 256x144&#xA;ffmpeg -i C:\Users\asifa\Desktop\Genius Grid\Transcode-service\input\c9fcf43726e617a295b203d5acb7b81658b5f05f80eafc74cee21b053422fef1.mp4 -y -c:v h264 -b:v 200k -c:a aac -b:a 64k -vf scale=256x144 -hls_time 10 -hls_list_size 0 -hls_segment_filename C:\Users\asifa\Desktop\Genius Grid\Transcode-service\output\hls\c9fcf43726e617a295b203d5acb7b81658b5f05f80eafc74cee21b053422fef1/c9fcf43726e617a295b203d5acb7b81658b5f05f80eafc74cee21b053422fef1_256x144_%03d.ts C:\Users\asifa\Desktop\Genius Grid\Transcode-service\output\hls\c9fcf43726e617a295b203d5acb7b81658b5f05f80eafc74cee21b053422fef1/c9fcf43726e617a295b203d5acb7b81658b5f05f80eafc74cee21b053422fef1_256x144.m3u8&#xA;Error transcoding with FFmpeg: Error: ffmpeg exited with code 2880417800: Unrecognized option &#x27;hls_segment_filename C:\Users\asifa\Desktop\Genius Grid\Transcode-service\output\hls\c9fcf43726e617a295b203d5acb7b81658b5f05f80eafc74cee21b053422fef1/c9fcf43726e617a295b203d5acb7b81658b5f05f80eafc74cee21b053422fef1_256x144_%03d.ts&#x27;.&#xA;Error splitting the argument list: Option not found`&#xA;

    &#xA;

  • Transcode video with php ffmpeg library

    27 juin 2019, par dev

    I need to upload video in 3 formate/resolution as 360p, 480p, 720p.

    After some research i got to know that some paid service are there like Amazone Elastic Transcoder . But i want to do with open source so i found FFMPEG.

    Also i want to upload video on Amazon s3 after transcode and video are in big size like video may contain 1GB size.

    I got php library for FFMPEG Library Link

    I have installed ffmpeg and it successfully generate new video. But i cannot figure out that how can i generate different formate/resolution as 360p, 480p, 720p.

    My sample Code is

           error_reporting(E_ALL);
           ini_set('display_errors', 1);

           require 'vendor/autoload.php';

           //$ffmpeg = FFMpeg\FFMpeg::create();
           $video = $ffmpeg->open('assets/small.mp4');
           $video
               ->filters()
               ->resize(new FFMpeg\Coordinate\Dimension(320, 240))
               ->synchronize();
           $video
               ->frame(FFMpeg\Coordinate\TimeCode::fromSeconds(2))
               ->save('assets/frame.jpg');

           $format = new FFMpeg\Format\Video\X264();
           $format->setAudioCodec("libmp3lame");

           $video->save($format, 'assets/new.mp4');

    Can anyone suggest me any way that how can i achieve this ??

  • Join 8 mono channels into 7.1 audio stream

    10 juin 2020, par Rafal B

    I'm trying to join 8 mono channels into 7.1 channels layout :

    &#xA;&#xA;

    ffmpeg -i L.ac3 -i R.ac3 -i C.ac3 -i Sub.ac3 -i BL.ac3 -i BR.ac3 -i SL.ac3 -i SR.ac3 -filter_complex "[0:a][1:a][2:a][3:a][4:a][5:a][6:a][7:a]join=inputs=8:channel_layout=7.1[a]"&#xA;-map "[a]" final-output.ac3&#xA;

    &#xA;&#xA;

    but I'm getting :

    &#xA;&#xA;

    Stream mapping:&#xA;  Stream #0:0 (ac3) -> join:input0&#xA;  Stream #1:0 (ac3) -> join:input1&#xA;  Stream #2:0 (ac3) -> join:input2&#xA;  Stream #3:0 (ac3) -> join:input3&#xA;  Stream #4:0 (ac3) -> join:input4&#xA;  Stream #5:0 (ac3) -> join:input5&#xA;  Stream #6:0 (ac3) -> join:input6&#xA;  Stream #7:0 (ac3) -> join:input7&#xA;  join -> Stream #0:0 (ac3)&#xA;Press [q] to stop, [?] for help&#xA;Output #0, ac3, to &#x27;final-output.ac3&#x27;:&#xA;  Metadata:&#xA;    encoder         : Lavf58.29.100&#xA;    Stream #0:0: Audio: ac3, 48000 Hz, **5.1(side)**, fltp, 640 kb/s (default)&#xA;    Metadata:&#xA;      encoder         : Lavc58.54.100 ac3&#xA;

    &#xA;&#xA;

    Why the output file is 5.1(side) ?

    &#xA;&#xA;

    Audio&#xA;Format                                   : AC-3&#xA;Format/Info                              : Audio Coding 3&#xA;Commercial name                          : Dolby Digital&#xA;Duration                                 : 54 min 5 s&#xA;Bit rate mode                            : Constant&#xA;Bit rate                                 : 640 kb/s&#xA;Channel(s)                               : 6 channels&#xA;Channel layout                           : L R C LFE Ls Rs&#xA;Sampling rate                            : 48.0 kHz&#xA;Frame rate                               : 31.250 FPS (1536 SPF)&#xA;Compression mode                         : Lossy&#xA;Stream size                              : 248 MiB (100%)&#xA;Service kind                             : Complete Main&#xA;

    &#xA;&#xA;

    I did not found anything that would explain this behavior.&#xA;I'm using latest ffmpeg and tried different methods : join, amerge. Always output file is 5.1(side)

    &#xA;